Blockage in the conveyor machine
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9.5.3 Remove blockages
Risk of injury due to pressurized components.
Although the mixing and delivery vessel is depressurized, the delivery
hoses may be under pressure. The delivery hoses can "flap" and when
the hose couplings are opened, mix can escape abruptly, causing serious
injuries.
− Before opening, stop the machine and ensure that the delivery hoses
are depressurized.
− Wear safety goggles. Residual pressures cause the conveyed material
to be discharged at an accelerated rate when the hose couplings are
opened.
− If conveyed material gets into the eyes, wash them out thoroughly and
consult a doctor immediately.
Risk of injury due to incorrect blockage removal.
Incorrect removal of blockages in the delivery hoses can lead to serious
injuries due to burst delivery hoses or hose couplings.
− Never use compressed air to push blockages out of the hoses.
− Stop work until the mixing and delivery vessel is depressurized.
− Wear appropriate personal protective equipment during removal.
− Make sure that no person is in the danger zone.
1. As soon as you notice a blockage, close the levers for the upper and
lower air.
2. Switch off the machine using the "Start/stop motor" button.
3. Vent the mixing and delivery vessel via the vessel vent (see Section
7.7.5).
4. Check the vessel pressure at the corresponding pressure gauge. The
mixing and delivery vessel must be depressurized.
➢ As soon as the mixing and delivery vessel is depressurized, the
delivery hose is also depressurized up to the first blockage in the
hose line.
5. Move the part of the delivery hose where you suspect the blockage
strongly back and forth (shake the hose). The blockage should come
loose.
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